Bob Mionske is a two-time U.S. Olympic cycling team member (4th in the 1988 road race) who now specializes in bicycle law in Portland, Oregon. He writes the “Legally Speaking” column for velonews.com, has a book called “Bicycling and the Law,” and runs a website. In short, he’s an expert on cyclists’ rights and how laws affect them.

His legal work also makes Mionske, 45, savvy about crashes. According to his research, there are about 500,000 cycling accidents each year that result in an emergency room visit. Here’s how they happen (numbers are rounded):